Find the indicated sum.

∑5i=1 (i+11)

A. 16

B. 70

C. 54

D. 28

Which expression is equivalent to - 9x-1 y-9 / - 15x5 y-3

Três quintos dividido por três quartos

38 = 5 (2-3) + 3b+1

The base of a right triangle measures 10 cm and its altitude measures √44 cm. What is the length of its hypotenuse? c=15cm c=13cm c=10cm c=12cm

katie spent 1/9 of a month working on her sience fair project while jerry spent 2/9 of a day. Which amount is less time

The blue line arrives every 10 minutes the red line arrives every 8 minutes and the yellow line arrives every 12 minutes, how long until they arrive at the station at the same time

A certain forest covers an area of 2500 km2. Suppose that each year this area decreases by 5.25%. What will the area be after 15 years? Use the calculator provided and round your answer to the nearest square kilometer.

Use the formula V = s³, where V is the volume and s is the edge length of the cube, to solve this problem. A cube-shaped container has an edge length of 23 feet. What is the volume of the container?

Dimitrus returned 5 library books last week, returned 3 books this week, and then checked out 8 more books. He now has 12 library books. How many books did he have before last week

Robin used 1/4 of a pound of butter to make a cake. Before she started, she had 7/8 of a pound of butter. How much butter did Robin have when she was done baking? Give your answer as a fraction of a pound.